Shareholders' Equity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Accumulated other comprehensive income (loss)
Balance of Accumulated Other Comprehensive Income (Loss) at beginning of period	$ (2,604)
Balance of Accumulated Other Comprehensive Income (Loss) at End of period	(2,172)	$ (2,604)
Treasury Stock, Value	300
Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(119)	29
Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), before Reclassification and Tax	398	(398)
Accumulated other comprehensive income (loss)
Balance of Accumulated Other Comprehensive Income (Loss) at beginning of period	(2,424)	(2,152)
Net realized gains (losses)	0	0
Other Comprehensive Income (Loss), Tax	(103)	97
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	176	(272)
Balance of Accumulated Other Comprehensive Income (Loss) at End of period	(2,248)	(2,424)
Deferred Gain (Loss) On Hedging Activities [Member]
Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	507	209
Accumulated other comprehensive income (loss)
Balance of Accumulated Other Comprehensive Income (Loss) at beginning of period	185	(12)
Net realized gains (losses)	(474)	45
Other Comprehensive Income (Loss), Tax	7	(57)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	40	197
Balance of Accumulated Other Comprehensive Income (Loss) at End of period	225	185
Pension Liability Adjustment [Member]
Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	190	(120)
Accumulated other comprehensive income (loss)
Balance of Accumulated Other Comprehensive Income (Loss) at beginning of period	(365)	(268)
Net realized gains (losses)	99	7
Other Comprehensive Income (Loss), Tax	(71)	16
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	218	(97)
Balance of Accumulated Other Comprehensive Income (Loss) at End of period	(147)	(365)
Unrealized Gain (Loss) On Investments [Member]
Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(2)	(27)
Accumulated other comprehensive income (loss)
Balance of Accumulated Other Comprehensive Income (Loss) at beginning of period	0	27
Net realized gains (losses)	0	0
Other Comprehensive Income (Loss), Tax	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(2)	(27)
Balance of Accumulated Other Comprehensive Income (Loss) at End of period	(2)	0
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	576	91
Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), before Reclassification and Tax	398	(398)
Accumulated other comprehensive income (loss)
Balance of Accumulated Other Comprehensive Income (Loss) at beginning of period	(2,604)	(2,405)
Net realized gains (losses)	(375)	52
Other Comprehensive Income (Loss), Tax	(167)	56
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	432	(199)
Balance of Accumulated Other Comprehensive Income (Loss) at End of period	$ (2,172)	$ (2,604)