Goodwill - Schedule of Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Roll Forward]
Goodwill at beginning of period	$ 4,467,000,000	$ 4,564,000,000
Impact of foreign exchange translation and other	(17,000,000)	(97,000,000)
Goodwill at end of period	4,450,000,000	4,467,000,000
Cumulative goodwill impairments	0
Transportation
Goodwill [Roll Forward]
Goodwill at beginning of period	2,520,000,000	2,527,000,000
Impact of foreign exchange translation and other	(46,000,000)	(7,000,000)
Goodwill at end of period	2,474,000,000	2,520,000,000
Logistics
Goodwill [Roll Forward]
Goodwill at beginning of period	1,947,000,000	2,037,000,000
Impact of foreign exchange translation and other	29,000,000	(90,000,000)
Goodwill at end of period	$ 1,976,000,000	$ 1,947,000,000