XML 60 R45.htm IDEA: XBRL DOCUMENT
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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2018
Subsequent Event [Line Items] |  |  |  |
Common Stock, Dividends, Per Share, Cash Paid | [1] | $ 1.050 | $ 1.050 |
2018 ATM, Aggregate Value of Common Stock |  | $ 500 |  | $ 500
Common Stock [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Dividends Payable, Date to be Paid | [1] | Jun. 29, 2018 | Mar. 30, 2018 |
Dividends Payable, Date of Record | [1] | Jun. 15, 2018 | Mar. 16, 2018 |
Dividends Payable, Date Declared | [1] | May 17, 2018 | Feb. 21, 2018 |
Lightower Acquisition [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Business Acquisition, Date of Acquisition Agreement |  |  |  | Nov. 01, 2017
Dividend Declared [Member] | Common Stock [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Dividends Payable, Date to be Paid |  |  |  | Sep. 28, 2018
Dividends Payable, Date of Record |  |  |  | Sep. 14, 2018
Dividends Payable, Date Declared |  |  |  | Aug. 02, 2018
Paid subsequent to year end [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Common Stock, Dividends, Per Share, Cash Paid |  | $ 1.050 |  |
July 2018 Tower Revenue Notes [Member] | Issuance of debt obligation [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Debt Instrument, Face Amount |  | $ 1,000 |  | $ 1,000
3.720% July 2018 Tower Revenue Notes [Member] | Issuance of debt obligation [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  | $ 250 |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 3.70% |
Debt Instrument, Maturity Date |  |  | Jul. 01, 2043 |
4.241% July 2018 Tower Revenue Notes [Member] | Issuance of debt obligation [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  | $ 750 |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.20% |
Debt Instrument, Maturity Date |  |  | Jul. 01, 2048 |
2018 Tower Revenue Notes Risk Retention Tranche [Member] | Issuance of debt obligation [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  | $ 53 |
[1] | Inclusive of dividends accrued for holders of unvested restricted stock units, which will be paid when and if the restricted stock units vest.

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