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Share-Based Payments - Summary of Restricted Stock and RSU Vesting Dates (Detail) - LTIP [Member] | Mar. 31, 2017 shares
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 1,514,404,000
April 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 5,164,000
June 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 544,000
July 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 4,004,000
October 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 3,997,000
December 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 657,112,000
January 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 2,749,000
April 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 2,755,000
June 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 544,000
July 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 1,420,000
October 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 1,424,000
December 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 525,736,000
January 2019 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 1,419,000
April 2019 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 1,424,000
December 2019 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 306,112,000
Shares Vesting [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 144,949,000
Shares Vesting [Member] | April 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 5,164,000
Shares Vesting [Member] | June 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 0
Shares Vesting [Member] | July 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 4,004,000
Shares Vesting [Member] | October 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 3,997,000
Shares Vesting [Member] | December 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 53,923,000
Shares Vesting [Member] | January 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 2,749,000
Shares Vesting [Member] | April 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 2,755,000
Shares Vesting [Member] | June 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 0
Shares Vesting [Member] | July 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 1,420,000
Shares Vesting [Member] | October 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 1,424,000
Shares Vesting [Member] | December 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 41,670,000
Shares Vesting [Member] | January 2019 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 1,419,000
Shares Vesting [Member] | April 2019 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 1,424,000
Shares Vesting [Member] | December 2019 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 25,000,000
RSU Vesting [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 1,369,455,000
RSU Vesting [Member] | April 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 0
RSU Vesting [Member] | June 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 544,000
RSU Vesting [Member] | July 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 0
RSU Vesting [Member] | October 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 0
RSU Vesting [Member] | December 2017 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 603,189,000
RSU Vesting [Member] | January 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 0
RSU Vesting [Member] | April 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 0
RSU Vesting [Member] | June 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 544,000
RSU Vesting [Member] | July 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 0
RSU Vesting [Member] | October 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 0
RSU Vesting [Member] | December 2018 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 484,066,000
RSU Vesting [Member] | January 2019 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 0
RSU Vesting [Member] | April 2019 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 0
RSU Vesting [Member] | December 2019 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of shares vesting | 281,112,000

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