Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 164	$ 257	$ 388	$ 503
Foreign currency translation adjustment	342	199	(409)	358
Net change in fair value of net investment hedges, net of tax of $54, $13, $(52) and $39	(174)	(40)	237	(116)
Net change in fair value of cash flow hedges, net of tax of $13, $22, $92 and $34	(37)	(57)	(251)	(91)
Amounts reclassified to earnings of cash flow hedges, net of tax of $(6), $(1), $(10) and $(1)	18	3	29	2
Other comprehensive income (loss)	149	105	(394)	153
Comprehensive income (loss)	313	362	(6)	656
Comprehensive income (loss) attributable to noncontrolling interests	110	162	(3)	295
Comprehensive income (loss) attributable to common shareholders	$ 203	$ 200	$ (3)	$ 361