Stockholder's Equity (Tables)

12 Months Ended

Dec. 31, 2015

Stockholders' Equity Note [Abstract]

Schedule of cash dividends declared

We declared the following cash dividend to QSC:

	Years Ended December 31,
	2015		2014	2013
	(Dollars in millions)
Cash dividend declared to QSC	$	1,350	1,400	1,325
Cash dividend paid to QSC	1,350		1,400	1,325