Share-Based Compensation - Change in Number of BSPCE/OSA/RSU (Details) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Exercised, options (in shares)	(1,470,323,000)	(1,533,616,000)	(3,175,843,000)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments [Roll Forward]
Beginning balance (in shares)	7,643,439,000	7,355,841,000	8,518,309,000
Granted (in shares)	3,160,683,000	2,725,139,000	3,017,104,000
Forfeited (in shares)	(1,130,428,000)	(903,925,000)	(1,003,729,000)
Ending balance (in shares)	8,203,371,000	7,643,439,000	7,355,841,000
OSA and BSPCE | Plans 1 and 2
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning balance, options (in shares)	87,557,000	204,077,000	1,134,737,000
Options granted (in shares)	0	0	0
Exercised, options (in shares)	(33,403,000)	(116,520,000)	(930,660,000)
Forfeited, options (in shares)	0	0	0
Ending balance, options (in shares)	54,154,000	87,557,000	204,077,000
OSA and BSPCE | Plan 3
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning balance, options (in shares)	337,658,000	935,591,000	2,333,763,000
Options granted (in shares)	0	0	0
Exercised, options (in shares)	(162,265,000)	(449,069,000)	(1,315,733,000)
Forfeited, options (in shares)	300,000	(148,864,000)	(82,439,000)
Ending balance, options (in shares)	175,693,000	337,658,000	935,591,000
OSA and BSPCE | Plan 4
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning balance, options (in shares)	0	87,559,000	361,118,000
Options granted (in shares)	0	0	0
Exercised, options (in shares)	0	(87,559,000)	(273,559,000)
Forfeited, options (in shares)	0	0	0
Ending balance, options (in shares)	0	0	87,559,000
OSA and BSPCE | Plan 5
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning balance, options (in shares)	819,347,000	1,184,725,000	1,929,299,000
Options granted (in shares)	0	0	0
Exercised, options (in shares)	(310,236,000)	(343,021,000)	(337,352,000)
Forfeited, options (in shares)	3,956,000	(22,357,000)	(407,222,000)
Ending balance, options (in shares)	513,067,000	819,347,000	1,184,725,000
OSA and BSPCE | Plan 6
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning balance, options (in shares)	692,931,000	889,800,000	1,204,248,000
Options granted (in shares)	0	0	0
Exercised, options (in shares)	(281,166,000)	(156,801,000)	(271,520,000)
Forfeited, options (in shares)	(12,324,000)	(40,068,000)	(42,928,000)
Ending balance, options (in shares)	399,441,000	692,931,000	889,800,000
OSA and BSPCE | Plan 7
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning balance, options (in shares)	1,287,578,000	1,817,135,000	1,555,144,000
Options granted (in shares)	0	0	749,330,000
Exercised, options (in shares)	(383,127,000)	(310,827,000)	(47,019,000)
Forfeited, options (in shares)	(153,923,000)	(218,730,000)	(440,320,000)
Ending balance, options (in shares)	750,528,000	1,287,578,000	1,817,135,000
OSA and BSPCE | Plan 8
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning balance, options (in shares)	3,322,783,000	2,236,954,000	0
Options granted (in shares)	429,043,000	1,621,734,000	2,267,774,000
Exercised, options (in shares)	(300,126,000)	(69,819,000)	0
Forfeited, options (in shares)	(508,866,000)	(466,086,000)	(30,820,000)
Ending balance, options (in shares)	2,942,834,000	3,322,783,000	2,236,954,000
OSA and BSPCE | Plan 9
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning balance, options (in shares)	0	0	0
Options granted (in shares)	147,400,000	0	0
Exercised, options (in shares)	0	0	0
Forfeited, options (in shares)	(23,025,000)	0	0
Ending balance, options (in shares)	124,375,000	0	0
RSU
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance (in shares)	1,095,585,000	0	0
RSUs granted (in shares)	2,584,240,000	1,103,405,000	0
Forfeited (in shares)	(436,546,000)	(7,820,000)	0
Ending balance (in shares)	3,243,279,000	1,095,585,000	0