Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive (Loss)/Income (Components Of Accumulated Other Comprehensive Income) (Details)

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Accumulated Other Comprehensive (Loss)/Income (Components Of Accumulated Other Comprehensive Income) (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Accumulated Other Comprehensive Income, Net Of Tax    
Beginning Balance, value $ (968) $ (524)
Ending Balance, value (918) (1,050)
Foreign Currency Translation Adjustments    
Accumulated Other Comprehensive Income, Before Tax    
AOCI, Pretax, Beginning Balance (113) (148)
Other Comprehensive Income (Loss), before Tax (11) (25)
AOCI, Pretax, Ending Balance (124) (173)
Accumulated Other Comprehensive Income, Tax    
AOCI, Tax, Beginning Balance 97 95
Other Comprehensive Income (Loss), Tax 0 0
AOCI, Tax, Ending Balance 97 95
Accumulated Other Comprehensive Income, Net Of Tax    
Beginning Balance, value (16) (53)
Other comprehensive loss (11) (25)
Ending Balance, value (27) (78)
Unrealized (losses)/Gains on Cash Flow Hedges    
Accumulated Other Comprehensive Income, Before Tax    
AOCI, Pretax, Beginning Balance (1) (1)
Other Comprehensive Income (Loss), before Tax 0 0
AOCI, Pretax, Ending Balance (1) (1)
Accumulated Other Comprehensive Income, Tax    
AOCI, Tax, Beginning Balance 1 1
Other Comprehensive Income (Loss), Tax 0 0
AOCI, Tax, Ending Balance 1 1
Accumulated Other Comprehensive Income, Net Of Tax    
Beginning Balance, value 0 0
Other comprehensive loss 0 0
Ending Balance, value 0 0
Defined Benefit Pension Plans    
Accumulated Other Comprehensive Income, Before Tax    
AOCI, Pretax, Beginning Balance 0 1
Other Comprehensive Income (Loss), before Tax 0 0
AOCI, Pretax, Ending Balance 0 1
Accumulated Other Comprehensive Income, Tax    
AOCI, Tax, Beginning Balance 0 0
Other Comprehensive Income (Loss), Tax 0 0
AOCI, Tax, Ending Balance 0 0
Accumulated Other Comprehensive Income, Net Of Tax    
Beginning Balance, value 0 1
Other comprehensive loss 0 0
Ending Balance, value 0 1
Accumulated Other Comprehensive (Loss)/Income    
Accumulated Other Comprehensive Income, Before Tax    
AOCI, Pretax, Beginning Balance (114) (148)
Other Comprehensive Income (Loss), before Tax (11) (25)
AOCI, Pretax, Ending Balance (125) (173)
Accumulated Other Comprehensive Income, Tax    
AOCI, Tax, Beginning Balance 98 96
Other Comprehensive Income (Loss), Tax 0 0
AOCI, Tax, Ending Balance 98 96
Accumulated Other Comprehensive Income, Net Of Tax    
Beginning Balance, value (16) (52)
Other comprehensive loss (11) (25)
Ending Balance, value $ (27) $ (77)