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	1	0	1	0
Comprehensive income (loss) attributable to common unitholders	$ 312	$ 362	$ (7)	$ 656