Segments and Geographic Information Segment and Geographic Information (Revenue and Assets by Country) (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue		$ 3,544	$ 3,542	$ 3,229	$ 3,271	$ 3,219	$ 3,522	$ 3,656	$ 3,758	$ 13,586	$ 14,155	$ 16,124
Property, plant and equipment, net		22,847				22,022				22,847	22,022
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	[1]									3,489	3,597	3,828
Property, plant and equipment, net	[1]	7,397				7,957				7,397	7,957
Total Non-U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										10,097	10,558	12,296
Property, plant and equipment, net		15,450				14,065				15,450	14,065
Brazil
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										3,755	3,858	4,987
Property, plant and equipment, net		3,221				2,582				3,221	2,582
CHILE
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										1,707	1,523	1,624
Property, plant and equipment, net		4,995				4,591				4,995	4,591
Dominican Republic
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										614	632	802
Property, plant and equipment, net		914				781				914	781
El Salvador
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										601	736	832
Property, plant and equipment, net		327				313				327	313
Colombia
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										437	557	552
Property, plant and equipment, net		451				445				451	445
PHILIPPINES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										401	406	451
Property, plant and equipment, net		866				735				866	735
ARGENTINA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										359	399	463
Property, plant and equipment, net		195				193				195	193
Mexico
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										342	383	434
Property, plant and equipment, net		699				716				699	716
Vietnam
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										340	233	0
Property, plant and equipment, net		1				2				1	2
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										337	396	533
Property, plant and equipment, net		151				190				151	190
BULGARIA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										334	382	410
Property, plant and equipment, net		1,174				1,259				1,174	1,259
Panama
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										312	297	263
Property, plant and equipment, net		1,233				1,027				1,233	1,027
Puerto Rico
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										301	302	348
Property, plant and equipment, net		583				599				583	599
JORDAN
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	[2]									136	248	262
Property, plant and equipment, net	[2]	452				469				452	469
KAZAKHSTAN
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										103	155	161
Property, plant and equipment, net		178				146				178	146
SRI LANKA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										10	45	107
Property, plant and equipment, net		0				0				0	0
Other Non-U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	[3]									8	6	$ 67
Property, plant and equipment, net	[3]	$ 10				$ 17				$ 10	$ 17

[1] Total Revenue Property, Plant & Equipment, netYear Ended December 31, 2016 2015 2014 2016 2015United States$3,489 $3,597 $3,828 $7,397 $7,957Non-U.S.: Brazil3,755 3,858 4,987 3,221 2,582Chile1,707 1,523 1,624 4,995 4,591Dominican Republic614 632 802 914 781El Salvador601 736 832 327 313Colombia437 557 552 451 445Philippines401 406 451 866 735Argentina359 399 463 195 193Mexico342 383 434 699 716Vietnam340 233 — 1 2United Kingdom337 396 533 151 190Bulgaria334 382 410 1,174 1,259Panama312 297 263 1,233 1,027Puerto Rico301 302 348 583 599Jordan136 248 262 452 469Kazakhstan103 155 161 178 146Sri Lanka10 45 107 — —Other Non-U.S.8 6 67 10 17Total Non-U.S.10,097 10,558 12,296 15,450 14,065Total$13,586 $14,155 $16,124 $22,847 $22,022

[2] Total Revenue Property, Plant & Equipment, netYear Ended December 31, 2016 2015 2014 2016 2015United States$3,489 $3,597 $3,828 $7,397 $7,957Non-U.S.: Brazil3,755 3,858 4,987 3,221 2,582Chile1,707 1,523 1,624 4,995 4,591Dominican Republic614 632 802 914 781El Salvador601 736 832 327 313Colombia437 557 552 451 445Philippines401 406 451 866 735Argentina359 399 463 195 193Mexico342 383 434 699 716Vietnam340 233 — 1 2United Kingdom337 396 533 151 190Bulgaria334 382 410 1,174 1,259Panama312 297 263 1,233 1,027Puerto Rico301 302 348 583 599Jordan136 248 262 452 469Kazakhstan103 155 161 178 146Sri Lanka10 45 107 — —Other Non-U.S.8 6 67 10 17Total Non-U.S.10,097 10,558 12,296 15,450 14,065Total$13,586 $14,155 $16,124 $22,847 $22,022

[3] Total Revenue Property, Plant & Equipment, netYear Ended December 31, 2016 2015 2014 2016 2015United States$3,489 $3,597 $3,828 $7,397 $7,957Non-U.S.: Brazil3,755 3,858 4,987 3,221 2,582Chile1,707 1,523 1,624 4,995 4,591Dominican Republic614 632 802 914 781El Salvador601 736 832 327 313Colombia437 557 552 451 445Philippines401 406 451 866 735Argentina359 399 463 195 193Mexico342 383 434 699 716Vietnam340 233 — 1 2United Kingdom337 396 533 151 190Bulgaria334 382 410 1,174 1,259Panama312 297 263 1,233 1,027Puerto Rico301 302 348 583 599Jordan136 248 262 452 469Kazakhstan103 155 161 178 146Sri Lanka10 45 107 — —Other Non-U.S.8 6 67 10 17Total Non-U.S.10,097 10,558 12,296 15,450 14,065Total$13,586 $14,155 $16,124 $22,847 $22,022