Fair Value Measurements (Quantitative Information about Level 3 Fair Value Measurements) (Details) (USD $)													12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Western Region Operations [Member]	Dec. 31, 2012 Western Region Operations [Member]	Dec. 31, 2011 Western Region Operations [Member]	Dec. 31, 2013 Level 3 [Member] Monte Carlo Simulation Approach [Member]	Dec. 31, 2012 Level 3 [Member] Monte Carlo Simulation Approach [Member]	Dec. 31, 2013 Level 3 [Member] Income Approach [Member]	Dec. 31, 2012 Level 3 [Member] Income Approach [Member]	Dec. 31, 2013 Level 3 [Member] Income Approach [Member] Western Region Operations [Member]	Dec. 31, 2012 Level 3 [Member] Income Approach [Member] Western Region Operations [Member]	Dec. 31, 2013 Embedded contractual derivative asset [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] Health Net Health Care Expenditures [Member] Minimum [Member]	Dec. 31, 2012 Embedded contractual derivative asset [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] Health Net Health Care Expenditures [Member] Minimum [Member]	Dec. 31, 2013 Embedded contractual derivative asset [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] Health Net Health Care Expenditures [Member] Maximum [Member]	Dec. 31, 2012 Embedded contractual derivative asset [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] Health Net Health Care Expenditures [Member] Maximum [Member]	Dec. 31, 2013 Embedded contractual derivative asset [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] Health Net Health Care Expenditures [Member] Weighted Average [Member]	Dec. 31, 2012 Embedded contractual derivative asset [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] Health Net Health Care Expenditures [Member] Weighted Average [Member]	Dec. 31, 2013 Embedded contractual derivative asset [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] National Health Care Expenditures [Member] Minimum [Member]	Dec. 31, 2012 Embedded contractual derivative asset [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] National Health Care Expenditures [Member] Minimum [Member]	Dec. 31, 2013 Embedded contractual derivative asset [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] National Health Care Expenditures [Member] Maximum [Member]	Dec. 31, 2012 Embedded contractual derivative asset [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] National Health Care Expenditures [Member] Maximum [Member]	Dec. 31, 2013 Embedded contractual derivative asset [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] National Health Care Expenditures [Member] Weighted Average [Member]	Dec. 31, 2012 Embedded contractual derivative asset [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] National Health Care Expenditures [Member] Weighted Average [Member]	Dec. 31, 2012 Embedded contractual derivative liability [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] Health Net Health Care Expenditures [Member] Minimum [Member]	Dec. 31, 2012 Embedded contractual derivative liability [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] Health Net Health Care Expenditures [Member] Maximum [Member]	Dec. 31, 2012 Embedded contractual derivative liability [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] Health Net Health Care Expenditures [Member] Weighted Average [Member]	Dec. 31, 2012 Embedded contractual derivative liability [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] National Health Care Expenditures [Member] Minimum [Member]	Dec. 31, 2012 Embedded contractual derivative liability [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] National Health Care Expenditures [Member] Maximum [Member]	Dec. 31, 2012 Embedded contractual derivative liability [Member] Level 3 [Member] Monte Carlo Simulation Approach [Member] National Health Care Expenditures [Member] Weighted Average [Member]	Dec. 31, 2013 Goodwill [Member] Level 3 [Member] Income Approach [Member] Western Region Operations [Member] Minimum [Member]	Dec. 31, 2012 Goodwill [Member] Level 3 [Member] Income Approach [Member] Western Region Operations [Member] Minimum [Member]	Dec. 31, 2013 Goodwill [Member] Level 3 [Member] Income Approach [Member] Western Region Operations [Member] Maximum [Member]	Dec. 31, 2012 Goodwill [Member] Level 3 [Member] Income Approach [Member] Western Region Operations [Member] Maximum [Member]	Dec. 31, 2013 Goodwill [Member] Level 3 [Member] Income Approach [Member] Western Region Operations [Member] Weighted Average [Member]	Dec. 31, 2012 Goodwill [Member] Level 3 [Member] Income Approach [Member] Western Region Operations [Member] Weighted Average [Member]	Dec. 31, 2012 Liability [Member] Level 3 [Member] Income Approach [Member] Minimum [Member]	Dec. 31, 2012 Liability [Member] Level 3 [Member] Income Approach [Member] Maximum [Member]	Dec. 31, 2012 Liability [Member] Level 3 [Member] Income Approach [Member] Weighted Average [Member]	Dec. 31, 2013 State Sponsored Health Plans Settlement Account Deficit [Member] Level 3 [Member] Income Approach [Member] Minimum [Member]	Dec. 31, 2013 State Sponsored Health Plans Settlement Account Deficit [Member] Level 3 [Member] Income Approach [Member] Maximum [Member]	Dec. 31, 2013 State Sponsored Health Plans Settlement Account Deficit [Member] Level 3 [Member] Income Approach [Member] Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Embedded contractual derivative asset							$ 7,200,000	$ 11,200,000
Goodwill	565,886,000	565,886,000	605,900,000	565,900,000	565,900,000	605,900,000					565,900,000	565,900,000
State-sponsored health plans settlement account deficit									62,900,000
Health Care Expenditures, range (as a percentage)													(3.34%)	(1.70%)	7.34%	0.80%	2.20%	(0.40%)	(0.77%)	3.70%	9.46%	3.70%	3.63%	3.70%	(0.30%)	10.10%	4.90%	(0.10%)	7.30%	3.30%
Embedded contractual derivative liability								3,200,000
Discount Rate, range (as a percentage)																															10.00%	9.00%	10.00%	9.00%	10.00%	9.00%	3.26%	3.26%	3.26%	1.135%	1.135%	1.135%
Lease impairment obligation										$ 7,400,000