Pension Plans and Postretirement Benefits - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013 Domestic Plans	Dec. 31, 2012 Domestic Plans	Dec. 31, 2011 Domestic Plans	Dec. 31, 2013 Domestic Plans Maximum	Dec. 31, 2013 TCN Plan	Dec. 31, 2012 TCN Plan	Dec. 31, 2011 TCN Plan	Dec. 31, 2013 TCN Plan Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected rate of return on plan assets	6.50%	5.30%	6.50%	6.50%	5.75%		6.90%	6.90%	5.75%
Expected rate of return on plan assets			5.00%				6.90%
Employer contributions, percentage match of participants' contributions			50.00%				50.00%
Defined contribution plan matching percent of compensation						6.00%				6.00%
Employer contributions, percentage unmatch of participants' contributions			3.00%				3.00%
Defined contribution plans costs			$ 6.4	$ 6.8	$ 6.6		$ 1.6