Segment Information - Assets, Investments, Equity, Capital Expenses and Depreciation and Amortization (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets
Total assets:	$ 9,756	$ 9,135	$ 9,421
Equity investments
Equity investments:	525	433	409
Equity earnings:
Equity earnings	77	60	60
Capital expenditures:
Capital expenditures:	441	454	402
Depreciation and amortization expense:
Depreciation and amortization expense:	488	478	409
Reportable Segment Totals
Assets
Total assets:	9,545	8,777	9,126
Equity investments
Equity investments:	468	216	245
Equity earnings:
Equity earnings	59	31	42
Capital expenditures:
Capital expenditures:	440	453	400
Depreciation and amortization expense:
Depreciation and amortization expense:	478	467	395
Europe
Assets
Total assets:	3,133	2,792	2,902
Equity investments
Equity investments:	95	78	78
Equity earnings:
Equity earnings	18	15	16
Capital expenditures:
Capital expenditures:	152	163	164
Depreciation and amortization expense:
Depreciation and amortization expense:	125	118	120
North America
Assets
Total assets:	2,794	2,522	2,500
Equity investments
Equity investments:	259	21	22
Equity earnings:
Equity earnings	41	12	19
Capital expenditures:
Capital expenditures:	106	108	97
Depreciation and amortization expense:
Depreciation and amortization expense:	134	139	128
Latin America
Assets
Total assets:	2,617	2,537	2,807
Capital expenditures:
Capital expenditures:	127	123	89
Depreciation and amortization expense:
Depreciation and amortization expense:	176	173	107
Asia Pacific
Assets
Total assets:	1,001	926	917
Equity investments
Equity investments:	114	117	145
Equity earnings:
Equity earnings		4	7
Capital expenditures:
Capital expenditures:	55	59	50
Depreciation and amortization expense:
Depreciation and amortization expense:	43	37	40
Other
Assets
Total assets:	211	358	295
Equity investments
Equity investments:	57	217	164
Equity earnings:
Equity earnings	18	29	18
Capital expenditures:
Capital expenditures:	1	1	2
Depreciation and amortization expense:
Depreciation and amortization expense:	$ 10	$ 11	$ 14