Intangibles (Intangible Assets by Major Class) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	$ 3,711	$ 892
Accumulated amortization	397	261
Net	3,314	631
Customer contracts and relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	3,184	654
Accumulated amortization	261	139
Net	2,923	515
Brand rights and tradenames
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	208	25
Accumulated amortization	33	24
Net	175	1
Royalty agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	129	129
Accumulated amortization	70	63
Net	59	66
Other intangible assets
Acquired Finite-Lived Intangible Assets [Line Items]
Gross	190	84
Accumulated amortization	33	35
Net	$ 157	$ 49