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Labor Union Contracts	12 Months Ended
Labor Union Contracts	Dec. 31, 2016
Labor Union Contracts
Labor Union Contracts	Labor Union Contracts Approximately 50% of our employees are members of various bargaining units represented by the Communication Workers of America and the International Brotherhood of Electrical Workers. We believe that relations with our employees continue to be generally good. Approximately 11,000, or 50%, of our employees that are subject to collective bargaining agreements that are scheduled to expire October 7, 2017.