XML 62 R48.htm IDEA: XBRL DOCUMENT v3.7.0.1
Stockholders' Equity - Share Repurchase Program (Details) - Common Stock - Share Repurchase Program 2016 - USD ($)
3 Months Ended
Mar. 31, 2017
Apr. 18, 2016
Equity, Class of Treasury Stock [Line Items]    
Stock repurchase program, authorized amount   $ 1,000,000,000
Stock repurchased during period (in shares) 843,300  
Stock repurchased during period $ 150,000,000  
Stock repurchase program, remaining authorized repurchase amount $ 550,000,000