Goodwill and Other Intangibles (Goodwill by Segment) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Ending balance December 31, 2017		$ 2,451,000,000	$ 3,118,000,000
Reassignment of goodwill			0
Impairment		0	(579,000,000)	$ 0
Reclassification to asset held for sale			(23,000,000)
Currency translation adjustment		(11,000,000)	(65,000,000)
Ending balance December 31, 2018		2,440,000,000	2,451,000,000	3,118,000,000
North America
Goodwill [Roll Forward]
Ending balance December 31, 2017		1,693,000,000	1,755,000,000
Reassignment of goodwill			(54,000,000)
Impairment			0
Reclassification to asset held for sale			0
Currency translation adjustment		2,000,000	(8,000,000)
Ending balance December 31, 2018		1,695,000,000	1,693,000,000	1,755,000,000
EMEA
Goodwill [Roll Forward]
Ending balance December 31, 2017		309,000,000	920,000,000
Reassignment of goodwill			0
Impairment	$ (579,000,000)	(579,000,000)	(579,000,000)
Reclassification to asset held for sale			0
Currency translation adjustment		(7,000,000)	(32,000,000)
Ending balance December 31, 2018		302,000,000	309,000,000	920,000,000
Latin America
Goodwill [Roll Forward]
Ending balance December 31, 2017		33,000,000	5,000,000
Reassignment of goodwill		53,000,000	53,000,000
Impairment			0
Reclassification to asset held for sale			(23,000,000)
Currency translation adjustment		0	(2,000,000)
Ending balance December 31, 2018		33,000,000	33,000,000	5,000,000
Asia
Goodwill [Roll Forward]
Ending balance December 31, 2017		416,000,000	438,000,000
Reassignment of goodwill			1,000,000
Impairment			0
Reclassification to asset held for sale			0
Currency translation adjustment		(6,000,000)	(23,000,000)
Ending balance December 31, 2018		$ 410,000,000	$ 416,000,000	$ 438,000,000