v3.10.0.1

Stockholders’ Equity (Tables) | 9 Months Ended
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Sep. 30, 2018
Equity [Abstract] |
Summary of stock repurchase activity under stock repurchase program | The stock repurchase activity under our stock repurchase programs during the nine months ended September 30, 2018 is summarized as follows (in millions, except per share amounts):
| Shares Repurchased (1) |  | Average Price per Share (2) |  | Value of Shares Repurchased |  | Remaining Amount Authorized
Balance as of January 1, 2018 |  |  |  |  |  |  | $ | 1,651 |
Authorization of additional plan in January 2018 |  |  |  |  |  |  | 6,000 |
Repurchase of shares of common stock | 79 |  |  | $ | 37.82 |  |  | $ | 3,000 |  |  | (3,000 | )
Balance as of September 30, 2018 |  |  |  |  |  |  | $ | 4,651 |
(1) | These repurchased shares of common stock were recorded as treasury stock and were accounted for under the cost method. None of the repurchased shares of common stock have been retired.
(2) | Excludes broker commissions.

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- Definition Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 + Details
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